Driver/passenger side airbag function - GF91.60-P-4004-02S
Hybrid gas generator, sidebag
Functional sequence
- When exceeding the release threshold for the sidebag, the restraint systems control module (N2/7) sends an electric ignition pulse to the ignition squib (4) in the hybrid gas generator.
- The ignition squib ignites the solid fuel rings in the fuel chamber (2)
- The solid fuel burns up. During this combustion process the bursting disk (5) is welded on.
- The compressed pure gas mixture (Argon/Helium, approx. 240 bar) escapes from the pressure tank (1), mixes with the exhaust gases and is then directed into the airbag via the discharge apertures (3).
During this process, the out-flowing gas is heated by the burning solid fuel, additionally increasing the gas volume.
- Under pressure of the in-flowing gas the expanding airbag forces its way out of the sidebag housing and the set breakthrough area of the inside door panel and enters the interior space.
- The airbag reaches its max. volume after approx. 20 ms.
- On reaching its max. volume, the pressure decrease in the airbag starts immediately. The gas escapes from the airbag via a filter and the airbag collapses.